// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: apfiles - File-related functions for acpidump utility
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*
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* Copyright (C) 2000 - 2020, Intel Corp.
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*
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*****************************************************************************/
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#include "acpidump.h"
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/* Local prototypes */
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static int ap_is_existing_file(char *pathname);
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/******************************************************************************
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*
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* FUNCTION: ap_is_existing_file
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*
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* PARAMETERS: pathname - Output filename
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*
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* RETURN: 0 on success
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*
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* DESCRIPTION: Query for file overwrite if it already exists.
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*
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******************************************************************************/
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static int ap_is_existing_file(char *pathname)
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{
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#if !defined(_GNU_EFI) && !defined(_EDK2_EFI)
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struct stat stat_info;
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int in_char;
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if (!stat(pathname, &stat_info)) {
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fprintf(stderr,
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"Target path already exists, overwrite? [y|n] ");
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in_char = fgetc(stdin);
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if (in_char == '\n') {
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in_char = fgetc(stdin);
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}
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if (in_char != 'y' && in_char != 'Y') {
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return (-1);
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}
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}
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#endif
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return (0);
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}
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/******************************************************************************
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*
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* FUNCTION: ap_open_output_file
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*
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* PARAMETERS: pathname - Output filename
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*
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* RETURN: Open file handle
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*
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* DESCRIPTION: Open a text output file for acpidump. Checks if file already
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* exists.
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*
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******************************************************************************/
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int ap_open_output_file(char *pathname)
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{
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ACPI_FILE file;
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/* If file exists, prompt for overwrite */
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if (ap_is_existing_file(pathname) != 0) {
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return (-1);
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}
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/* Point stdout to the file */
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file = fopen(pathname, "w");
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if (!file) {
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fprintf(stderr, "Could not open output file: %s\n", pathname);
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return (-1);
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}
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/* Save the file and path */
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gbl_output_file = file;
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gbl_output_filename = pathname;
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return (0);
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}
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/******************************************************************************
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*
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* FUNCTION: ap_write_to_binary_file
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*
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* PARAMETERS: table - ACPI table to be written
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* instance - ACPI table instance no. to be written
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*
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* RETURN: Status
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*
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* DESCRIPTION: Write an ACPI table to a binary file. Builds the output
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* filename from the table signature.
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*
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******************************************************************************/
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int ap_write_to_binary_file(struct acpi_table_header *table, u32 instance)
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{
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char filename[ACPI_NAMESEG_SIZE + 16];
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char instance_str[16];
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ACPI_FILE file;
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acpi_size actual;
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u32 table_length;
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/* Obtain table length */
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table_length = ap_get_table_length(table);
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/* Construct lower-case filename from the table local signature */
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if (ACPI_VALIDATE_RSDP_SIG(table->signature)) {
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ACPI_COPY_NAMESEG(filename, ACPI_RSDP_NAME);
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} else {
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ACPI_COPY_NAMESEG(filename, table->signature);
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}
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filename[0] = (char)tolower((int)filename[0]);
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filename[1] = (char)tolower((int)filename[1]);
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filename[2] = (char)tolower((int)filename[2]);
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filename[3] = (char)tolower((int)filename[3]);
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filename[ACPI_NAMESEG_SIZE] = 0;
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/* Handle multiple SSDts - create different filenames for each */
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if (instance > 0) {
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snprintf(instance_str, sizeof(instance_str), "%u", instance);
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strcat(filename, instance_str);
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}
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strcat(filename, FILE_SUFFIX_BINARY_TABLE);
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if (gbl_verbose_mode) {
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fprintf(stderr,
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"Writing [%4.4s] to binary file: %s 0x%X (%u) bytes\n",
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table->signature, filename, table->length,
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table->length);
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}
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/* Open the file and dump the entire table in binary mode */
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file = fopen(filename, "wb");
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if (!file) {
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fprintf(stderr, "Could not open output file: %s\n", filename);
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return (-1);
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}
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actual = fwrite(table, 1, table_length, file);
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if (actual != table_length) {
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fprintf(stderr, "Error writing binary output file: %s\n",
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filename);
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fclose(file);
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return (-1);
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}
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fclose(file);
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return (0);
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}
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/******************************************************************************
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*
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* FUNCTION: ap_get_table_from_file
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*
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* PARAMETERS: pathname - File containing the binary ACPI table
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* out_file_size - Where the file size is returned
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*
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* RETURN: Buffer containing the ACPI table. NULL on error.
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*
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* DESCRIPTION: Open a file and read it entirely into a new buffer
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*
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******************************************************************************/
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struct acpi_table_header *ap_get_table_from_file(char *pathname,
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u32 *out_file_size)
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{
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struct acpi_table_header *buffer = NULL;
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ACPI_FILE file;
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u32 file_size;
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acpi_size actual;
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/* Must use binary mode */
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file = fopen(pathname, "rb");
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if (!file) {
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fprintf(stderr, "Could not open input file: %s\n", pathname);
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return (NULL);
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}
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/* Need file size to allocate a buffer */
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file_size = cm_get_file_size(file);
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if (file_size == ACPI_UINT32_MAX) {
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fprintf(stderr,
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"Could not get input file size: %s\n", pathname);
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goto cleanup;
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}
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/* Allocate a buffer for the entire file */
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buffer = ACPI_ALLOCATE_ZEROED(file_size);
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if (!buffer) {
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fprintf(stderr,
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"Could not allocate file buffer of size: %u\n",
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file_size);
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goto cleanup;
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}
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/* Read the entire file */
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actual = fread(buffer, 1, file_size, file);
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if (actual != file_size) {
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fprintf(stderr, "Could not read input file: %s\n", pathname);
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ACPI_FREE(buffer);
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buffer = NULL;
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goto cleanup;
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}
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*out_file_size = file_size;
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cleanup:
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fclose(file);
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return (buffer);
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}
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